Cobalt substitution effects on critical current, inter-grain full penetration field, and critical temperature study for Tl2Ba2Ca2Cu3-xCoxOy bulk superconductor, where x is from 0.005 to 0.05

In the present study, a YBa2Cu3O7−y bulk superconductor added with 5~10 wt% Ag was fabricated employing Sm123 as a seed to produce a superconductive single crystal. Metallic silver was added to the single crystal of YBa2Cu3O7−y to remove defects such as cracks and pores. Electromagnetic properties of the bulk superconductor at 77 K were analyzed based on relationships of magnetic levitation, trapped magnetic force, and critical current density. The critical current density of the superconductor at 77 K and 0 T was 3.53 × 104 A/cm2. Discontinuous points in the distribution of magnetic field lines were not observed, implying that these two specimens grew well as a single crystal without specific weak links. For the growth of a superconductive nano crystal employing slow cooling at temperature of formation of 123 phase, superconductive nano crystals were aligned in a-b direction, the direction of peak current flow. The peak value of the trapped magnetic force of the YBa2Cu3O7−y superconductor specimen was 3.23 kG. Using the FC method, peak forces of attraction and repulsion were 21.696 N and 70.168 N, respectively.

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Studies on Development of MgB2 Superconductor with Improved In-Field Critical Current Density

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.117.63 ◽

2010 ◽

Vol 117 ◽

pp. 63-68 ◽

Cited By ~ 1

Author(s):

Krishnankutty Vinod ◽

Syamaprasad Upendran

Keyword(s):

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Natural Material ◽

Bulk Superconductor ◽

Mgb2 Wires ◽

Heating Method ◽

Self Heating ◽

Critical Current Density Jc ◽

Powder In Tube

The present study focuses on the preparation of good quality MgB2 superconductor in bulk, wire/tape forms and on the improvement of in-field critical current density [JC(H)]. MgB2 bulk superconductor was prepared by a simple Powder-In-Sealed-Tube (PIST) method and MgB2 wires and tapes were prepared by the Powder-In-Tube (PIT) method. A novel electrical self-heating method was introduced for the preparation of Fe sheathed MgB2 wires and tapes. Burned Rice Husk (BRH), an inexpensive natural material is found to be one of the best additives for enhancing the in-field critical current density of MgB2. By selecting suitable combinations of additives a significant enhancement of the critical current density by 1-2 orders of magnitude were achieved for fields > 5 T, at 5-15 K.

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Critical Current, Critical Temperature and Magnetic Field Based EMTDC Model Component for HTS Power Cable

IEEE Transactions on Applied Superconductivity ◽

10.1109/tasc.2007.898034 ◽

2007 ◽

Vol 17 (2) ◽

pp. 1726-1729 ◽

Cited By ~ 15

Author(s):

Jong-Hyun Bang ◽

Hyang-Ho Je ◽

Jae-Ho Kim ◽

Ki-Deok Sim ◽

Jeonwook Cho ◽

...

Keyword(s):

Magnetic Field ◽

Critical Temperature ◽

Critical Current ◽

Power Cable ◽

Model Component

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Critical temperature gradient and critical current density in thin films of a type I superconductor

Physics Letters A ◽

10.1016/0375-9601(68)90352-6 ◽

1968 ◽

Vol 28 (5) ◽

pp. 383-384 ◽

Cited By ~ 7

Author(s):

R.P. Huebener

Keyword(s):

Thin Films ◽

Critical Temperature ◽

Temperature Gradient ◽

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Type I

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Distinct doping dependence of critical temperature and critical current density in Ba1−xKxFe2As2 superconductor

Scientific Reports ◽

10.1038/srep26671 ◽

2016 ◽

Vol 6 (1) ◽

Cited By ~ 22

Author(s):

Dongjoon Song ◽

Shigeyuki Ishida ◽

Akira Iyo ◽

Masamichi Nakajima ◽

Jun-ichi Shimoyama ◽

...

Keyword(s):

Critical Temperature ◽

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Doping Dependence

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Influence of the size of Gd211 starting powder on the critical current density of Gd-Ba-Cu-O bulk superconductor

Superconductor Science and Technology ◽

10.1088/0953-2048/13/6/330 ◽

2000 ◽

Vol 13 (6) ◽

pp. 778-784 ◽

Cited By ~ 89

Author(s):

S Nariki ◽

S J Seo ◽

N Sakai ◽

M Murakami

Keyword(s):

Critical Current Density ◽

Critical Current ◽

Current Density ◽

Bulk Superconductor

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Porosity Effect on Superconducting Properties of YBa2Cu3Oδ and YCaBa4Cu6Oδ

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1107.601 ◽

2015 ◽

Vol 1107 ◽

pp. 601-605

Author(s):

S.A. Senawi ◽

H. Azhan ◽

W.N.F.W. Zainal ◽

W.A.W. Razali ◽

A. Nazree ◽

...

Keyword(s):

Critical Temperature ◽

Critical Current Density ◽

Porous Structure ◽

Critical Current ◽

Current Density ◽

Resistivity Measurement ◽

Effective Cross Section ◽

Ceramic Materials ◽

Solid State Reaction Method ◽

Superconducting Properties

This paper reports on the properties of YBa2Cu3Od (Y123) and YCaBa4Cu6Oy (Y146) with non-porous and porous structures. The relationship between calcium doping and critical temperature (Tc) was studied to determine the optimal superconducting properties. A series of heating and grinding via solid state reaction method was used to fabricate the ceramic materials. The electrical properties were investigated via critical temperature, TC and critical current density, JC using the resistivity measurement system (RMS). Scanning Electron Microscope (SEM) and X-Ray Diffraction (XRD) were used to analyze the material morphology and structure, respectively. The orthorhombicity increased due to less porosity of the samples. The calcium presence partially replaced larger Ba(II) site and degraded orthorhombicity. The highest critical current density (JC) was porous YCaBa2Cu3Oy which was 2.32 A/cm2 compared to 0.75 A/cm2 for porous YCaBa4Cu6Oy at 60 K. The critical temperature for porous structure was less than non porous structure for Ca doped Y146 system which was 69.9 K and 67.9 K. SEM micrograph unveiled that the Jc was induced significantly by continuity of grain formation via grain size. Pores homogenized the grains surface quality and connectivity due to strain release thus increasing effective cross section of the sample for current density (Jc) over the vast areas.

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